On PC, you can change the colour via altering the XML file*. I have mine set to, what is commonly called, "mocha". This tones down the orange dayglo effect. I have also tried a green HUD, monochrome and white.
Edit:
* Do NOT do this unless you are sure what you're about. Messing up this file will result in the game failing to load and you'll need to run the file verification from the launcher. As always, before making any alterations, back the file up first. I can't reiterate that enough as I had exactly this happen to me after I changed the file erroneously.